Pipe-coupling.



PIPE COUPLING. APPLICATION FILED ocT. s. |916.

A Panama@ Mb.. 2 w.

a salma-nut W. A. HALL".

PIPE COUPLING. APPLlcATloN man 00125. 1916.

Eatnted Feb. 26, 19181.

2 SHEETS-SHEET 2.

'I tt amcdidcatgon l natasha ll d UML, ot" ventanas,- 1

rma-connaitre.

To all whom t may concern:

lBe it known that ll, WILLIAM A. Hann, a citizen of the United tates,residing at Yonkers, in the county of Westchester and State of New`fork, have invented certain new and useful Improvements in Pipe-Counfailings, of which-the following is a specica ion.

My invention relates to-pipe couplings for connecting the endsof pipesand is especially adapted for joining the sections of conduitsv whichwill orma, moisture-proof seal at the joint or connection.

ni my prior raar No.. 1,168,196 1 closed a coupling and a method offorming 'sealed joints employing the usual threade pipe ends.v llt isfrequently desirable 'how ever, to eliminate the 'necessity forthreading the ends of pipes and conduit sections, especially where thesemust be cut to dierent .lengths by the -mechanics as the work is beinginstalled in a building structure.. Not only is much valuable timeconsumed in threading the pipe, which requires a certain tools must betaken from place to place yand skill, but the thread-cutting benches andbe moved from one .part of the building to another. M present inventioneliminates all of this a ditional labor and expense and enables theworkmen to quickly. connect kthe unthreaded ends of pipe and conduits,and:

at the saine time insures .an absolutely tight moisture-proof pint. llt'also avoids thenecessity' of ma ingMwipedfjoints where these are nowrequired as when connecting the ends of lead covered cables to the niples or danged openings of junction or p boxes. ,I My invention will beunderstood from the foregoing `description in connection with the'accompanying drawings in which-#Figure l is a longitudinal section of ajoint formedv between the adjacent or meeting ends of pipe or conduitsections with my-'pipe coupling; Fig. 2 is a longitudinal section of thetpecitcatilon of Lettera Patent.

Patented heb. 2d, fhfd. 'application nlcd october t, wie. aerial tto.mamut.

5 and 6 are enlarged sectional `detail views gitu mal section of my couling when used to connect 'a lead covered ca le to a junction box; Figs.8 and 9 are exaggerated detail of a dportion of the coupling; Fig. 'l isa lon-- views; lfig 10 isa longitudinal sectional view of my couplingused as a pull box;A

and liig. l1 is a side yelevation. of a pipe or conduit having the bendsor angles formed by means of my couplings.

ln the form of my invention illustrated vin Figs. v1 and 2, the metalcoupling comprises 4a couplingsleeve l, having oppositely taperingexternally threaded contractile end pornuts 2, having a tapered bore toengage the threaded endsv of the sleeve and contract' them onto the endsof the pipe or conduit sections 3, 3', the bore ofthe nuts having aslightly greaterv inclination than the taper of the sleeve portions. illn order that the tapered portions l of `tions l', and internallythreaded collars orv thesleeve may yield and be 'graduallyconcover theslots w en in position as shown in Fig. 1, yet the joint would notbemoistureproof. l, therefore, close the slots 5, 5% with a filler ofsofter material 6, such as lead or spelter. Whennow the nuts or collars2 are screwed upon the threads of the tapered s portions, the oppositeedges of the `slots are forced toward each other, causing the lead-iller to yield or How and bepartly extruded.

ln order that the lead may `not dow or crowd too tightly into thethreads, it 1s sorne- ,times desirable that the lead inthe slots shallnot 'extend initially to the periphery of the sleeve.` When the collarnuts 2 are screwed tight into nal locked the larger end, the collarextends eyond the osition atv inner end of the slot and conhnes the softspelter or lead ller which tends to be extruded by the increasingcompressionv as the ict' collarfis screwed upon the threads of thetapered portion and this results in thefortm-- ing an absolutelymoisture-proof seal between the collar and the sl eeve.` lhe leadfiller. completely lls the slots and. is slightly extruded at the ends,as' indicated at et, llt

forming a tight seal at these points. v By 1' i.

t@ gagement with the pipe-se tions when the 9. The. lead coating ingring 2.. This method of eonnecti pipe or cable tothe junction or outletoxes making the slots wedge-shape, as at 5 in Fig. 2, Aany compressionof the slot will insure a compression of the soft filler along .theentire length of the slot.

While the inner periphery of the outer ends of the sleeve is forced intosuch intimate contact with the periphery of the pipe 3 or with theenamel or other coating 3 thereon, that an effective seal is produced,yet for some purposes, I prefer to also coat the inner surface or boreof the sleeve with lead or other soft material which will absolutelyinsure a moisture-proof seal when the ends are forced into contact withthe pipe.

To further increase the frictional engagement of the sleeve with thepipe sections, I may roughen the interior surface or bore of the sleevein any suitable manner, preferablyT so that there shall be sli htprotuberances. This may be accomplishe by threading the interior with avery fine thread. This fine.

thread or other roughness is then coated, by platin orother means, withlead or other suitab e soft material 8, as appears more clearly in theexaggerated detail Fi 8. When the tapered ortions 1 of the s eeve arecontracted by orcing the nuts 2 thereover, the protuberances 10, whichas'stated above maybe in the form of fine threads, out

through the thin lead film or coating 8, and engage the' pipe or theenamel or lead covering thereon inthe manner illustrated in Fig.completely closes the interstices between t e threads or protuberances10, and the pipe coating, and completes a perfect moisture-proof seal. iThe engagement of the protuberances or threads 10 with the pipe forms agrip between the coupling and the pipe which prevents any movement orslipping and unites the parts as effectively as athreaded joint.

In Fig. 7, I have shown the manner of employing my couplin to connect apipe, conduit or lead covere cable to a junction box. The inner end ofthe coupling member 1b may be provided with a. ilange'which bears.against the inside of the box 12, and is secured in position by thelock nut 14. A

ysealed 'joint is then effected with the cable or pipe 3b b means of thecontractile slotted tapered en in coperation with the clam t e permitsthese boxes to be changed if desired without disturbing the piping. j

In Fig. 10,' I have shown how my coupling may be used in lieu of a ullbox b employing a. coupling mem er `of cient length to bridge a pullinggap between two lengths of pipe or conduit. The wires or conductors '16,can be pulled from the pipe 17, and fed into the pile 17 the parts o t ecoupling having first een slipped over the pipe ends in the mannershown. TheA pipe sections are then united by sliding the coupling member1 across the gap with the opposite ends extending over the ends of bothpipes. Sealed joints are then formed b screwing the collars 2 over thetapered en of the coupling.

My coupling is adapted to form very strong rigid connections between theends of pipes required to extend across a long span and to form theelbows connecting pipe sections running in dierent directions. In Fig.11, I have shown the elbows or bends connecting the pipe sections formedby means of my couplings. It will be noted that the full strength of thepipe is maintained since no threads are cut into it and furthermorethere are no threads to corrode.

The advantages of my ipe coupling over prior constructions and t e largesaving in the expense of making connections between pipe or conduitsections without the necessity for threading the pipe will be apreciated by engineers and contractors amiliar with prior cou lings.

I have described in detail the particular construction illustrated inthe accompanying drawings for the urpose of fully disclosing myinvention ut it is evident that many changes and modifications can bemade within the scope of my claims and without in any manner departingfrom the spirit of my invention.

I elaimz- 1. A couplin comprising a tubular member or sleeve a apted tosurround a ipe or cable, said sleeve being provided wit a slot which isc losed with softer material than the main body of the sleeve, and beingexternally tapered and threaded, and an internally tapered and threadedcollar adapted to com ress said sleeve when threaded thereon, anextending over the 4ends of the slot to thereby confine the soft llerbetween the sleeve and collar as it is extruded to thereby torni? alcompletely sealed moisture-proof join 2. A coupling, comprising atubular member or sleeve a apted to surround a pipe or cable and havin aslot closed with a softer material than e main body thereof, said sleevehaving its inner surface or bore provided with protuberances and beingcoated with a softer material,-`the ends of said sleeve being externallytapered and threaded and an internally tapered and threaded colaradapted to compress said sleeve when threaded thereon, and extendingover the ends of Ythe slot to thereby conne the soft filler between thesleeve and. collar as it is extruded to thereby form a completelysealedmoisture-proof joint.

3. -A couplin comprising a tubular member or sleeve a apted to surrounda pipe or cable and having a plurality of slots closed with .asofter-material than the main body thereof, said `sleeve having itsinner surface retrata I l :tt

or bore provided with protuberances, the

ends of said sleeve being externally tapered and threaded, and aninternally tapered and threaded collar adapted -to compress said sleevewhen threaded thereon, and extending over the ends of the slots tothereby confine the soft filler between the sleeve and collar as it isextruded to thereb form a completely sealed moisture-proo joint.

4. A coupling, comprising a tubular menr ber or sleeve adapted tosurround a -pipe or 'cable and having a slot closed with a softer imaterial than the main body thereof, said the ends of said sleeve beingexternally tapered and lthreaded, and. an internally tapered andthreaded collar adapted to com press said sleeve when threaded thereon,and extending over the ends of the slotto thereby conline the softfiller between the sleeve and collar as it is extruded to thereby form acompletely sealedmois'tureroof joint.

In testimony whereof I winni A. LL.

X my signature.

